CN203398670U

CN203398670U - Square double-wall corrugated pipe

Info

Publication number: CN203398670U
Application number: CN201320430711.3U
Authority: CN
Inventors: 周成立
Original assignee: FUJIAN HENGSHENG PIPES Co Ltd
Current assignee: FUJIAN HOSHING PLASTICS CO LTD
Priority date: 2013-07-19
Filing date: 2013-07-19
Publication date: 2014-01-15
Anticipated expiration: 2023-07-19

Abstract

The utility model provides a square double-wall corrugated pipe comprising an outer-layer pipe and an inner-layer pipe. The outer-layer pipe and an inner-layer pipe are welded together through hot melting, the outer-layer pipe is a corrugated pipe fitting, and cross sections of peaks and troughs of the corrugated pipe fitting. The inner-layer pipe is a pipe fitting having a square cross section. Square corners are processed to be rounded corners. The square double-wall corrugated pipe has the advantages of great construction convenience, high bending strength, high ring stiffness and strong stretching resistance, and can satisfy trenchless construction requirements.

Description

Square double-wall corrugated pipe

Technical field

The utility model relates to a kind of industrial tubing, relates in particular to a kind of square double-wall corrugated pipe.

Background technology

The tubing in the field such as power cable, communication sheath is generally polypropylene single-wall corrugated pipe and HDPE double-wall corrugated pipe at present, their structure is circle, there is following shortcoming in polypropylene single-wall corrugated pipe wherein: 1, because it is circular configuration, tubing needs to add tubulature pillow when mounted, fixing, (pipe is when stacking layer by layer, if do not installed additional outside, it is square pipe pillow, tubing will roll, cause and can not install), therefore, tubing construction is more loaded down with trivial details, human cost is high, inefficiency because using extra pipe pillow, has therefore improved again cost in addition; 2,, because being circular configuration, its vertical plane holding capacity is not as square pipe, so compression strength is slightly poor; 3, because being single layer structure, have fault of construction in holding capacity, ring stiffness is relatively low, and the longitudinal strength of tubing is not high yet, easily crooked; 4,, because internal and external walls is all corrugated, as occurred that stone is stuck in wave trough when constructing, can cause cable maybe cannot be passed through by scratch; 5, because it only has one deck wall, so shock resistance destructiveness is compared with double-wall corrugated pipe, and there is a big difference.

There is following shortcoming in HDPE double-wall corrugated pipe: 1, because it is circular configuration, tubing needs to add tubulature pillow when mounted, and fixing, (pipe, when stacking layer by layer, is square pipe pillow if do not installed additional outside, tubing will roll, cause and can not install), therefore, tubing construction is more loaded down with trivial details, human cost is high, inefficiency because using extra pipe pillow, has therefore improved again cost in addition; 2,, because being circular configuration, its vertical plane holding capacity is not as square pipe, so compression strength is slightly poor; 3, HDPE material is softer, and ring stiffness is low; 4, vicat temperature is lower, can not meet the requirement of electric power to high security; 5, because HDPE Tensile strength is low, cannot be applied to non-excavating construction.

Utility model content

The purpose of this utility model is to provide the square double-wall corrugated pipe that a kind of convenience of constructing is good, longitudinal strength is high, compression strength is high.

The utility model is achieved in that a kind of square double-wall corrugated pipe, comprise outer tube and inner layer pipe, between outer tube and inner layer pipe, by hot melt, be welded together, described outer tube is bellows part, and the crest place of this bellows part and trough Chu cross section are square; Inner layer pipe is the pipe fitting that cross section is square; Square edge is processed as fillet.

Further prioritization scheme is: the thickness of described outer tube is 3-6mm.

Further prioritization scheme is: the thickness of described inner layer pipe is 3-6mm.

Further prioritization scheme is: the width at the crest summit place of described outer tube is 12-40mm.

Further prioritization scheme is: the arc radius of the both sides, place, trough the lowest point of described outer tube is 3-50mm.

Further prioritization scheme is: described outer tube and inner layer pipe are modified polypropylene material structure.

The square double-wall corrugated pipe of the utility model has the following advantages: 1, because profile is square, so installation is good, can not need another tubulature pillow, only need tie up with rope, saves manpower and material cost, and efficiency of construction improves, and comprehensive cost reduces; 2, because inner layer pipe is square planomural, smooth structure layer, form stable triangle or trapezoidal with outer tube, thereby can greatly promote compression strength and the tubing buckling strength of tubing, 3, because inner layer pipe is square planomural structure, if any foreign matter in pipe, can conveniently remove, therefore can avoid because there being the events such as foreign matter causes that cable scratch maybe cannot be passed through; 4, because selecting modified polypropene or the modified polyethylene material that good heat resistance and tensile strength are high, so the good heat resistance of tubing and can meet non-excavation; 5, because tubing is double-walled construction, so its shock resistance is destructive good.

Accompanying drawing explanation

The utility model is further described with reference to the accompanying drawings in conjunction with the embodiments.

Fig. 1 is the overall structure schematic diagram of the square double-wall corrugated pipe of the utility model.

Fig. 2 is the A-A cross-sectional view of the square double-wall corrugated pipe of the utility model.

Symbol description in figure: 1, outer tube, 2, inner layer pipe, 11, trough, 12, crest.

Embodiment

Below in conjunction with specific embodiment, the utility model is described in detail.

Refer to shown in Fig. 1,2, it is a kind of square double-wall corrugated pipe described in the utility model, comprise outer tube 1 and inner layer pipe 2, between described outer tube 1 and inner layer pipe 2, by hot melt, be welded together, described outer tube 1 is bellows part, and crest 12 places of this bellows part and trough 11Chu cross section are square; The pipe fitting that inner layer pipe 2 is square for cross section; Square edge is processed as fillet.

The thickness of outer tube 1 is 1～10mm, and optimum thickness is 3-6mm, adopts through the modified polypropylene material of the good strength of modification or other material modifiedly, can improve outer pressure resistance; Its crest 12 places and trough 11Chu cross section are square, play the effect of enhancing; Outer tube 1 forms stable triangle or trapezoidal with inner layer pipe 2, thereby can greatly promote compression strength and the bending pipes intensity of tubing; The width at the crest 12 summit places of described undulatory outer tube 1 is 5-50mm, and optimum width is 12-40mm, trough 11 both sides, place, the lowest point arc radius be 3-50mm, optimum arc radius is 3-10mm.

The thickness of inner layer pipe 2 is 1-10mm, optimum thickness is 3-6mm, adopt modified polypropylene material that lubrification is good or other is material modified, its structure is the pipe fitting that cross section is square, play the effect of reinforcing waveform and reducing coefficient of friction, thereby when reaching equality strength, more save material, and improve efficiency of construction.

The production method of the square double-wall corrugated pipe of the utility model is: with A extruder, extrude outer tube, with B extruder, extrude inner layer pipe simultaneously, sizing water jacket and the square sizing module of then flowing through is shaped into square double-wall corrugated pipe, all can good bond under the effect of high temperature between two-layer, form whole.Outer tube of the present utility model and inner layer pipe can be modified polypropene or other material modified structure sheaf, also can adopt the different materials of welding mutually of two kinds of difference in functionalitys.

Claims

1. a square double-wall corrugated pipe, comprise outer tube (1) and inner layer pipe (2), between outer tube (1) and inner layer pipe (2), by hot melt, be welded together, it is characterized in that: described outer tube (1) is bellows part, and the crest of this bellows part (12) is located and trough (11) Chu cross section is square; The pipe fitting that inner layer pipe (2) is square for cross section; Square edge is processed as fillet.

2. square double-wall corrugated pipe according to claim 1, is characterized in that: the thickness of described outer tube (1) is 3-6mm.

3. square double-wall corrugated pipe according to claim 1, is characterized in that: the thickness of described inner layer pipe (2) is 3-6mm.

4. square double-wall corrugated pipe according to claim 1, is characterized in that: the width at crest (12) the summit place of described outer tube (1) is 12-40mm.

5. square double-wall corrugated pipe according to claim 1, is characterized in that: the arc radius of the both sides, trough (11) place, the lowest point of described outer tube (1) is 3-50mm.